Have a '12 XF 800 high country. Bought a rear skid and track from a '12 PC M800, minus the rear shock. My question is can I use my rear shock from the HC in the M skid? Everything seems to be identical except for the length of the rails. Don't have a M shock to measure for length and the part #'s for the HC and the M are different. Don't care to buy another shock when I could use the $$ on ALOT of other things.